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US 4,377,357 AGranted
Doweling jig
OwnerAnthony W. Buterainventor
Life of this patent
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OwnerAnthony W. Buterainventor
Estimating the term…
This invention relates to a "T" shaped doweling jig and an attachable convertible clamp device for holding a work part. The doweling jig is comprised of a drill bit guide hole member and a base plate. The drill bit guide hole member is provided with at least one defined drill bit guide hole which is interchangeable with other guide hole members and provides a range of defined drill bit diameter guide holes. The base is provided with at least one alignment port hole, cut-outs and alignment indicies that correspond with said guide holes, and provides for the correct positioning and clamping of the doweling jig over the work part, and the subsequent passing of the drill bit through a guide hole in one direction to drill the first work part, and consecutively to pass the drill bit through the same guide hole in the opposite direction to drill a mirror image hole in a second work part. The convertible clamp is used in a "C" shaped configuration to drill holes in work parts to be joined in a side-to-side relation or is converted to a "Z" shape configuration to drill holes in work parts to be joined in a non planar right angle relation.
A "T" shaped doweling jig comprising a substantially rectangular base plate having a top face with two parallel side edges, at least one alignment port hole formed through said top face, said alignment port hole having sides which taper in ramp-like configuration from a predetermined larger opening to a predetermined smaller opening, at least one ramp-like tapered cut-out formed in each of said side edges, at least one straight port hole girth line extending across said top face from one of said cut-outs to another of said cut-outs, said girth line bisecting said alignment port hole, a substantially rectangular drill bit guide hole member having a top surface with two parallel side edges with a thickness less than said predetermined smaller opening, at least one defined drill bit guide hole extending transversely through said guide hole member, at least one straight guide girth line extending transversely across said top surface from edge to edge, said guide hole girth line bisecting said guide hole, means for attaching said guide hole member to said base plate, said guide hole member being centrally and perpendicularly attached to said base plate to form said "T" shaped doweling jig and intersect said alignment port hole, convertible clamp means for clamping said doweling jig to a workpiece, means for removably attaching said clamp means to said doweling jig, said clamping means comprising a substantially rectangular clamp base portion having two ends, a threaded bore formed through one of said ends, a clamp screw threadably engaged in said threaded bore, a substantially rectangular frame portion, a substantially rectangular frame extension portion attached perpendiculary to said frame portion, a substantially rectangular axial frame extension portion, means for removable attaching said frame extension portion axially to the other end of said frame portion, means for rotatably attaching said frame portion to the other end of said clamp base portion whereby said clamp means can be selectively converted from a "C" configuration to a "Z" clamp configuration by rotating said frame portion relative to said clamp base portion.
Dependencies are inferred from the claim text.